| 000 | 00525nam a2200193Ia 4500 | ||
|---|---|---|---|
| 008 | 131223s9999 xx 000 0 und d | ||
| 040 | _aISI KOLKATA | ||
| 041 | _aEnglish | ||
| 082 |
_a551.22 _bOb12 |
||
| 100 | _aObert Leonard | ||
| 245 | _aMicro-seismic method of determining the stability of underground openings | ||
| 260 | _c1957 | ||
| 300 | _a18p. | ||
| 500 | _aphoto-print from US Bureau of Mines, Bull. 573, 1957. | ||
| 650 | _aGeology | ||
| 650 | _aSeismology | ||
| 700 |
_aDuvall W I _4Auth. |
||
| 942 | _cBK | ||
| 999 |
_c99957 _d99957 |
||